dotnet/aspnetcore v8.0.21 on GitHub

What's Changed

Update branding to 8.0.21 by @vseanreesermsft in #63509
[release/8.0] (deps): Bump src/submodules/googletest from 373af2e to eb2d85e by @dependabot[bot] in #63500
[release/8.0] Make duplicate deb/rpm packages so we can sign them with the new PMC key by @github-actions[bot] in #63250
[release/8.0] Extend Unofficial 1ES template in IdentityModel nightly tests job by @github-actions[bot] in #63466
[release/8.0] Quarantine ResponseBody_WriteContentLength_PassedThrough by @github-actions[bot] in #63534
[release/8.0] Update dependencies from dotnet/source-build-reference-packages by @dotnet-maestro[bot] in #63261
[release/8.0] Use wait assert in flaky tests by @ilonatommy in #63565
[release/8.0] Update Microsoft.Build versions by @github-actions[bot] in #62507
Merging internal commits for release/8.0 by @vseanreesermsft in #63603
backport(8.0): Fix runtime architecture detection logic in ANCM by @DeagleGross in #63706

Full Changelog: v8.0.20...v8.0.21